Motional Electromotive Force Flashcards
(5 cards)
1
Q
What is electromotive force measured in
A
(e in v)
2
Q
what happens when conductor Na are placed in and move through a magnetic field with flux density Bf
A
after dt time period, distance travelled = dx and area covered by movement is dA = dx * L where L = length of conductor
Na experiences change in flux, emf induced
(voltage is produced)
3
Q
formula for induced emf (form sheet)
A
𝑒 = 𝑁𝐴 (𝑑𝜙/𝑑𝑡) = 𝑁𝐴𝐵𝐹(𝑑𝐴/𝑑𝑡) = 𝑁𝐴𝐵𝐹𝑙(𝑑𝑥/𝑑𝑡) = 𝑁𝐴𝐵𝐹𝑙v
velocity v = dx/dt
4
Q
what 3 quantities must be perpendicular
A
Bf, L, v
5
Q
how does this relate to faradays law
A
different form of faradays law but based on physical movement instead of time-varying so Ia can be related to Na*phi by the inductance of a conductor
